ndiswrapper-general

hi,
when calling
loadndisdriver 8086 1043 /lib/windrivers/w70n5.sys /lib/windrivers/w70n5.inf
i get the message:
Unable to open kernel driver: Permission denied
i used several windows drivers with the same result. i looked at syslog
even after switching debug on but saw
kernel: ndiswrapper version 0.4 loaded
but nothing more. what is going wrong? i have an centrino wlan in an
ibm thinkpad t41 and used the driver which came with the device and
both drivers mentioned at your webpage.
best regards,
michael